Javascript Object Expected Error in IE (Working Safari/Chrome/FF)

[Pezmc]

Simple JS to clear fields and enable/disable a submit button, it works fine in all browsers except IE (grr...)

IE throws a Object expected error on line 19, 21, 32 & 34 of the html
L19

onfocus="join_field(this,'[e-mail]')" onblur="leave_field(this,'[e-mail]')" /></p>

L21

onfocus="join_field(this,'p4ssxord')" onblur="leave_field(this,'p4ssxord')" /></p>

L32

onfocus="join_field(this,'03cucjamf')" onblur="leave_field(this,'03cucjamf')" /></p>

L34

onfocus="join_field(this,'p4ssxord')" onblur="leave_field(this,'p4ssxord')"  /></p>

I have absolutely no idea what is causing this error. Why is IE always so different?
Does anyone know what is causing it & how to fix it?

<form id="activate" name="activate" method="post" action="">
      	<div class="legend">Activate Your Account</div>
        <div class="form"> 
              <p><label for="username">SLS Username: </label><input type="text" name="username" id="username" value="03cucjamf"
              		onfocus="join_field(this,'03cucjamf')" onblur="leave_field(this,'03cucjamf')" /></p>
              <p><label for="password">SLS Password: </label><input type="password" name="password" id="password" value="p4ssxord"
              		onfocus="join_field(this,'p4ssxord')" onblur="leavefield(this,'p4ssxord')"  /></p>
              <p><input type="submit" name="submit" id="activateb" value="Activate" disabled="disabled" /></p>
        </div>
      </form>

// JavaScript Document
function join_field(what, text) {
	if(what.value == text) {
		what.value=''; 
		what.style.color='#000';
	}
}
function leave_field(what, text) {
	if(what.value == '') {
		what.value=text;
		what.style.color='#888';
	}
}
function checkifempty() {
	if (document.login.username.value!=='[e-mail]'&&document.login.username.value!=='') {
		if(document.login.password.value!=='p4ssxord'&&document.login.password.value!=='') {
			document.login.loginb.disabled=false;
			document.login.loginb.style.color = "#000";
			document.login.loginb.style.border = "1px #000 solid";
		} else {
			document.login.loginb.disabled=true;
			document.login.loginb.style.color = "#888";
			document.login.loginb.style.border = "1px #ccc solid";
		}
	} else {
		document.login.loginb.disabled=true;
		document.login.loginb.style.color = "#888";
		document.login.loginb.style.border = "1px #ccc solid";
	}
	if (document.activate.username.value!=='[e-mail]'&&document.activate.username.value!=='') {
		if(document.activate.password.value!=='p4ssxord'&&document.activate.password.value!=='') {
			document.activate.activateb.disabled=false;
			document.activate.activateb.style.color = "#000";
			document.activate.activateb.style.border = "1px #000 solid";
		} else {
			document.activate.activateb.disabled=true;
			document.activate.activateb.style.color = "#888";
			document.activate.activateb.style.border = "1px #ccc solid";
		}
	} else {
		document.activate.activateb.disabled=true;
		document.activate.activateb.style.color = "#888";
		document.activate.activateb.style.border = "1px #ccc solid";
	}
}
if (document.all || document.getElementById) {
	setInterval("checkifempty()",100)
}

[BuzzPHP]

O, I see.

In one field, you have are calling "leavefield". It Should be "leave_field"

After making the change the code seems to work in IE

[Weedpacket]

Incidentally,

	setInterval("checkifempty()",100)

could be written more efficiently as

	setInterval(checkifempty,100);